Spanner-wrench.



G. AMBGRN. SPANNER WRENCH. APPLICATION FILED 11:13.11, 190s.

956,259. Patented Apnz, 1910.

2 SHEETS-SHEET 1.

INVENTOR Gr. AMBORN. SPANNER.A WRENCH. APPLICATION FILED 11:11.11, 1908.

P11-,ema Apr. 26, 1910,.-

u G. l F 5.

v INVENTOR il' JNO/'m' 'f V WITNE'SSES:

4rd M ir a 'in if GEORGE AMBORN, 0F NEW lYORK, N. Y., ASSIGNOR TO J'. H.'WILLIAMS & CO., OF BROOKLYN, NEW YORK, CORPORATION 0F NEW YORK.

SPANNEBAWRENCH.

Application led February 11, 1908. Serial Ita-415,427.

To all whom 'it may concern:

`Be it known that l, GEORGE AMBORN, 4a citizen of the United States,residing in the borough of Brooklyn, county of Kings, city and State ofNew York, have invented certain new and useful Improvements inSpannerfllvren'ches, of which the following is a specification.

This invention relates to wrenches of the Spanner type and aim-s toprovide certain improvements therein. v p

The. invention is' particularly Adirected to a wrench in the use ofwhich it is not necessary to bodily remove the wrench from the nut oneach reverse stroke. Several wrenches of this general type have been iproposed, but each of these has been open to some objection, eitherthat'of excessive cost of manufacture or of weakness of construction.

According to my invention, l provide a wrench of this type in which thevarious parts are of strong and durable construction, which is capableof use either with a square nut or a hexagonal nut and which is of cheapand simple construction.

My invention also includes other features p of novelty which arehereinafter referred to.

Referring to the drawings,Figure 1 is -a top or plan view of the head ofmy improved wrench. Figs. 2 to 4 are more or less diagrammatic viewsillustrating the action of the wrench in connection with a square nut.

y Fig.l 5 is a view similar to Fig. 2 showing the action of the wrenchwith a hexagonal nut. Fig. 6 is a similar view illustrating anadditional or supplementary means for acting upon the nut. Fig. 7 is anelevation showing the wrench in use.

Referring to the drawings let A' indicate Vthe head of the'wrench and Ba suitable handle preferably formed integrally with the head. The headi's' constructed with two 'arms Cv and D,preferably of integral con`struction, the arm C being longer than the arm D as shown. socketbetween them which is designed to receive the nut, the 'bottom of suchsocket approaching by preference the `angular form of two contlguousfacets of a. hexagonal nut. o A

According to m arm D is form Vinvention `the' shorter with asubstantially vstraight active face a, which, as shown in Fig. 3, engaes the lower part of the left hand facet o a Square nut when the wrenchSpecication of Letters Eatent.

'tically the full The two arms form' a,

Patented Apr. 26, 31910.

is turned in the direction of the arrow. The face a 1s `also adaptedtoengage the left hand facet of a hexagonal nut as shown in Fig. 5.

The arm C is provided with a similar 'until it engages the nextadjacent,y facet.

I `he bottom of the socket of the wrench, while following in a generalway the angle of two facets of a hexagonal nut is neverthef lessof apeculiar formation which aids 'very materially in the operation of thewrench;

By reference to Fig. 3 it will be seen 'that' instead of following thevdotted line d which extends 1n substantially the same direction as afacet. of 'a hexagonal nut, l recess or' deepen the socket as indicatedby the full line e. Thefeect of this change is illustrated bytheposition of the nut shown in full lines. lts lower right hand corner isenabled to drop a considerable distance farther into the socket, so thatits lower left hand corner extends much farther into the socket on theopposite side whereby prac' length of the bearing face a of the short'arm D is'utilized. If the socket were formed as vindicated by thedotted line d the nut would be .thrown outwardly face a could .beutilized. This would Vnecessitate the lengthening yof -the face a in .acurved face Aso that only the out-er end of the bearing 1 an outwarddirection a corresponding dstance which would be .a detriment. I alsopreferably form the adjacent face f of .the

bottom of the socket in such manner as to leave a cam surface as bestillustrated in Fig. 4. -This formation of the socket leavesa recess ornotch 7 1. conti ous to the working face a of the arm D into which .thecorner of the nut can extend. At the same time,on the reverse'stroke ofthe wrench, indicated by the arrow in Fig. 4, the corner i of the nutrides upwardly on the face g throwing the mit outwardly Vof thesoclnet'to a slight extent, thereby permitting desirable that the face abe long enough to have an adequate working surface to engage the nut.Under these circumstances, however, if the cam g were omitted the cornerof the nut z' would sink down a proportionateV distance and cause thecorner j to bind against the face b of the arm C.

It will be understood that the cam and recess are important and that ifthese are provided the exact shape of the bottom of s the socket isrelatively unimportant. 'It may be modified, among other ways, as shownin dotted lines in F ig. 5. These features are applicable to a wrenchdesigned for operating upon a square nut or a hexagonal nut. Theoperation of the various features of construction is substantially thesame in the case of a hexagonal nut as that just de-v scribed. Asillustrated in Fig. 5A the bearing faces b and a form eiiicient contactswith the facets of a hexagonal nut, while the Cam g and recessed socketact to permit the effective gripping of the nut and the easy reversal ofthe wrench. A very important feature of my invention is that the wrenchis capable of acting upon nuts of considerably different sizes, from thefull size permitted by the dimensions of the socket to those of muchsmaller size.

By the construction just described, I am enabled to provide a wrenchwhich moves over the facets of the nut, whether square orhexagonal, withsubstantially as easy a movement as a ratchet wrench, and with little orno liability of the wrench being thrown ofi' the nut. l At the same timeI gain a very important advantage that thearms are not recessed orweakened. To this advantage is added a considerable decrease in cost ofconstruction. The entire wrench may be formed of a single forging andits socket and bearing faces easily and con.- veniently finished'by theuse of ordinary tools in one operation. There are no laterall recesseswhichcan be finished only with difficulty. In fact the wrench herein canbe made as cheaply as the ordinary Spanner wrench.

The wrench may, if desired, be provided with a spring bolt or similarmember'su'ch as o (Fi 6) which isl actuated by a spring p of sucientstrength to force the wrench slightly away' from'the nut so as tofacilitate the reversing. action. This will however not ordinarily benecessary.

Preferably the wrench is. also provided on one side with an oblique faceg which is. by preference duplicated on the other side of the wrench.This face is best formed upon a ange or rib r as best shown in Fig. 7.One of the purposes of this construction is also illustrated in thisgure. It frequently happens where a series of bolts are used that inscrewing on one nut the handle will move over an adjacent bolt or nut.This restricts the use of the wrench and very Yoften causes injury bytearing the hand of In the construction of the wrench the user.described the oblique faces g' form bearing surfaces upon which the headof the wrench works with the handle extended in an inclined position asshown. in Fig. 7. ls enables the Wrench to beworked freely over anadjacent bolt without danger of injury.

Although I have shown in detail one 'form of my invention, I do not wishto be limited thereto as various modifications may be made withoutdeparting from the invention. It is obvious that the jaws need not beintegral or in fixed relative positions, and that the invention may beapplied to other types of wrenches than the form shown. The term spannerwrench is used in the claims t'o cover such types.

What I claim is 1. A Spanner wrench having a short arm adapted to engagea facet of either a square or a hexagonal nut and to'exert a pullingstrain thereon, and a long arm of sucient length to engage adiametrically opposite facet of either a square or a hexagonal nut at apoint past the middle of such facet in the direction of rotation, andsaid wrench having between such arms a socket shaped to receive a squareor a hexagonal nut while said arms are engaged as set forth, and'saidlonger arm being straight on its inner side.

2. A Spanner wrench having a short arm adapted to engage a facet ofeither a square or a hexagonal nut and to exert 'a pulling strainthereon, andl a long arm of sufficient length t9 engage a diametricallyopposite facet of either a square or a hexagonal nut at a point past themiddle of such facet in the direction of rotation, and said Wrenchhaving between such arms a socket shaped to receive a square or ahexagonal nut while saidarms are engaged as set forth, and said longer.arm being straight on its inner side and said socket having a recess atits bottom on-the side of said longer arm, and a cam at its bottom onthe side of said shorter arm.

3. A Spanner wrench having a short arm adapted to engage a facet ofelther a square or a hexagonal nut and to exert a pulling strainthereon, and a long arm of sutcient length to engage a diametricallyopposite facetv of either a square or a hexagonal nut `at a point pastthe middle of such facet in 1C and bein face extending forwardly, andoutwardly from its inner side and adapted to rook upon 5 movement.

4.' a spanner wrench, a handle and a' head, said head having -two 'armswith a socket between them to receive the nut, one of said `arms beingshorter than the other,

formed with a curved face extending orwardly and outwardly from theinner side of the arm, said face 'being adapted to rock upon the nut asthe wrench given its reverse movement, and the longer 15 arm being.formed with a substantially straight inner face, the socket betweensuch'v arms being deeper on the side of the longer arm and beingprovided with a cam on the opposite lside.

gon nuts having a handle and ahead, said head having two'arms with aparallel sided (socket between them, such socket being formed at itsinner end to receive -a corner 25 of a heXa-gon nut, but being deeperon-one side than on the other whereby .to form a 956,259'- Y. l ff 5. Aspannerwrench for squareand hexa.

s vaeebetween.the facet of the nut `and such l 6.'v A` Spanner wrench.having two 'arms for directly engagmg 'a nut, a soeketi'bej tweenv sucharms, and a spring-operated means for, ressing the wrench awayfrom saidnut, w` ereby to facilitate'reversal of the wrench. f `7'. A's annerwrench having a handle and;

,side ofthe socket, andhaving a camon the 'opposite side of such socket.1

the nut as the wrench is given its reverse` u '30.

a' head Arlgidly' xed thereto, said head havl ing two jaws forming asocket between them and havingxa flange or rbw' of less width than-thehead, said rib'extending alon both scribing witnesses.

4Witnesses EUGENE V.. M YERs,

Trreopona T. SHELL.

4o said arms and around said socket, an haveatest height atV theinner'end of GEORGE AMBoRN..

